Electric marking device



Nov. 2, 1948. c. M. ELSTAD ELECTRIC MARKING DEVICE Filed April 2, 1947 Patented Nov. 2, 1948 UNITED STATES PATENT OFFICE ELECTRIC MARKING DEVICE Clayton M. Elstad, Minneapolis, Minn.

Application April 2, 1947, Serial No. 738,967

1 Claim. 1

My invention relates to improvements in electric marking devices for producing register marks on the edge portion of a piece of material as indicated on the pattern according to which the material has been out.

It is Well known, in making a shirt, dress or other article comprising two or more pieces out according to patterns placed thereon, that said patterns have in their edge portions register notches. Before a pattern is removed from the material, corresponding notches are cut in the material or the material is marked at said notches and thereafter the notches are cut in the material.

Flcr articles comprising quite a number of pieces, groups of notches are used in addition to single notches. The purpose of the notches in pieces of material for a single article is to bring corresponding notches in the several pieces of material into registration. Said pieces are then correctly positioned relative to each other to be connected by stitches or otherwise.

In factories where mass production is practiced relative to the making of shirts, dresses and other articles comprising several parts, the material to be cut from the given pattern is stacked to the height of several inches, six in some instances.

In cutting register notches, which are quite deep, in the edge portions of pieces of material, it is necessary to leave wide edge portions for the hems. The result of these wide edge portions is quite a waste of material and in mass production the loss is considerable.

The principal object of this invention is to pro vide a highly eiiicient electric marking device for producing, by burning, small shallow notches, in the edge portions of pieces of material in a stack that have been out according to a pattern thereon, that register with the notches in the pattern.

Another object of this invention is to provide a novel resistance marking element that is evenly heated throughout the entire portion thereof that contacts the material being marked.

A further object of this invention is to provide an electric marking device that can be manipulated .by the operator to mark the edge portions of material in deep notches in the material.

Other objects of the invention will be apparent from the following description, reference being had to the drawing.

To the above end, generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claim.

In the accompanying drawing, which illustrates the invention, like characters indicate like parts throughout the several views.

Referring to the drawing:

Fig. 1 is a side elevational view of the improved electric marking device;

Fig. 2 is a front elevational view of the same;

Fig. 3 is a top plan view of the marking device;

Fig. 4 is a fragmentary detail view, on an enlarged scale, principally in plan with the resistance marking element sectioned on the line li of Fig. 1;

Fig. 5 is a fragmentary detail view with the base sectioned on the line 3- 3 of Fig. 1, on the same scale as Fig. 4;

Fig. 6 is a detail view principally in section taken on the line 5 6 of Fig. 4;

Fig. 7 is a fragmentary detail view, showing the resistance marking element sectioned on the line i 'l of Fig. 1, on the same scale as Fig. 4; and

Fig. 8 is a wirin diagram.

The numeral 9 indicates a thin metal base, the marginal edge portion of which is beveled to a relatively sharp edge to facilitate its insertion under a stack of material to be marked by the device. An upright tubular handle 19 that is oval shape in cross-section is rigidly secured to the base 9 at its transverse center and rear end portion. This handle I9 is wrapped with a rope i i that provides a good grip for the handle l0.

A support l2, in the form of a channel, is rigidly secured to the handle ID, at its upper end, and overlies the base 9. Mounted on the support 12 directly over the handle I0 is a rectangular housing l3. In the top of the housing 13 is an insulating member M on which is mounted a pair of primary contacts 5 for a plug attached to wires leading from an suitable source of electrical energy, not shown.

A transformer I6 is mounted on the support l2 forwardly of the housing l3. Primary wires I! lead from the contacts [5 from within the housing 13, to the transformer [6, as shown in Fig. 8. Removable cover plates is are provided for the sides of the transformer IS.

A keeper I9 of insulating material, for a resistance marking element 20, is mounted on the support l2 and projects forwardly thereof. The marking element 20 is a small long upright metal rod that loosely projects, at its upper end portion, through a hole 22 in the keeper IS.

A boss .23 is integral with the base 9 directly below the keeper Hi. In a broad sense, the boss 23 is a part of the base. The boss 23 has at its transverse center a slot 24 that extends longitudinally of the base 9. The marking element 20 has a horthe slot 24. A set screw 26 having threaded engagement with the boss 23 impinges the extension 25 of the marking element 20 and clamps the same against the boss 23 at one side of the slot 24. It will be noted, by reference to Fig. 4, that the forward end portion of the slot 28. is wider than the rear end portion where the extension 25 is clamped by the screw 26, thus permitting free movement of the lower end portion of the marking element 20.

A second terminal 21 is frictionally clamped to the upper end portion of the marking element by a screw 28. Secondary wires 29 and 35 lead from the transformer It. The wire is has a terminal 3| attached by a screw 32 to the under side of the support l2 as a ground, indicated in Fig. 8, by the numeral 33. Thewire 3G is attached to the terminal 21.

On the under side of the support is a heat defleeting plate St. A coiled spring 36 encircles the marking element 20 and is held compressed between the keeper i9 and the support 52 and is under strain to lift said marking element. This spring 36 yieldingly holds the marking element 20 with freedom for expansion and contraction.

The operative length of the marking element is substantially from the keeper I9 to the boss 23. It has been found that the marking element 20 will not heat to its extreme lower end-hence the extension 25. With this extension 25 the operative length of the heating element 20 will be evenly heated.

The tapered front end portion of the boss 23 Will lift the lowermost piece of material so that the marking element 20 will come in contact therewith at the time the marking device is moved toward the stack of material.

The spacing of the marking element 26 the long distance from the handle I0 is highly important in order to mark by burning, the edges of a. stack of material in deep notches or other irregular pieces.

' From what has been said, it will be understood that the electric marking device described is capable of modifications as to details of construction and arrangement within the scope of th i e io h re scl se and cla me What I claim is;

In a device of the class described, a base, an upright handle on the base, a housing having primary contacts, a long horizontally disposed support extending forwardly over the base and having at its outer end an insulating guide, an upright resistance marking element having its lower end secured to the base and its upper end portion held by the guide, and two secondary contacts, one of which is on the marking element, said marking element being substantially unobstructed throughout its entire length and spaced materially from the handle for the insettion of a stack of tongue-shaped pieces of goods formed by an indentation out in the goods, the insertion oi the goods between the handle and the marking element positioning the marking element in the indentation, whereby the goods may be marked by forward, rearward or lateral move.- ment of the marking element by the device.

C A TON M- AD- FE EN C TE UNITED PATENTS Name Date Walter Jan. 9, 193.4

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